immunomodulatory effects of glutathione garlic derivatives and hydrogen sulfide Frontiers Glutathione in Our Diet and
Description
It's in how they interact

The samples were treated for 1 h with 12.5% acetic acid in ethanol, then washed with 100% ethanol for 1 min, and then washed with 50% ethanol for 1 min

doi: 10.3390/nu15214575

These three enzymes seem to be originally derived from primary Leu biosynthesis, and due to neo-functionalization show an activity toward 2-oxo (keto)-acids of Met in GSL biosynthesis

van der Hooft CS, Hoekstra A, Winter A, de Smet PA, Stricker BH
